3 . OPEN LEVERLOCK – and place expanded ring on to the drum cover with
the vertical-skirt hugging the drum body (see Fig. 5).

4 . CLOSE LEVERLOCK – by slowly and cautiously pulling the LEVERLOCK so
that the outer ring engages the cover / body juncture. Downward pressure along
with tapping the outside of the ring may assist in an even closure (see Fig.
6).